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Adheseal Autoshield ActivatorVendor:
For automotive and industrial glazing jobs where polyurethane adhesives must bond reliably to smooth, non-porous surfaces, Autoshield Activator AP1001 prepares the substrate to prevent adhesive failure. This clear wipe-on adhesion promoter chemically alters the surface energy of glass and lacquer to secure a strong...- From $48.66
- From $48.66
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Everflex Multi-Prime Acrylic PrimerVendor:
For prep work on substrates with varying absorption rates, Everflex Multi-Prime Acrylic Primer is a single-part, water-based acrylic primer that stabilises both porous and non-porous surfaces. It is formulated to prepare substrates for the application of Everflex waterproofing membranes, self-levelling compounds, cement-based ceramic tile...
- From $71.69
- From $71.69
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Everflex VBS Water-based Epoxy PrimerVendor:
For sealing green concrete, priming damp substrates, or blocking rising damp, Everflex VBS Water-based Epoxy Primer provides a high-density moisture barrier. This two-part water-based epoxy controls negative hydrostatic pressure up to a 25-metre head of water, preventing moisture migration from destroying timber flooring, polyurethane...
- $440.44
- $440.44
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Everflex Primer WBPVendor:
For porous wall and floor substrates prior to tiling, levelling, or waterproofing, Everflex Primer WBP is a water-based, penetrating acrylic primer designed to seal the surface, enhance adhesion, and prevent blistering and pinholes in subsequent coatings. What it does Everflex Primer WBP penetrates porous...
- From $48.26
- From $48.26
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Adheseal Primer 50AVendor:
For high-liability installations on non-porous substrates where maximum performance and longevity are required, Primer 50A is a fast-drying adhesion promoter. This clear alcohol solution is a single-pack, ready-to-use wipe that prepares difficult-to-bond surfaces for Polyurethane, MS, Silicone, and acrylic sealants and adhesives. How it...
- $53.03
- $53.03
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Everflex Polyurethane SupaprimeVendor:
Everflex Polyurethane Supaprime is a porous substrate primer for caulking, civil construction, and waterproofing. One litre covers 5 to 10 square metres depending on porosity, and its very low viscosity sinks deep into concrete, masonry, and timber to give sealants and membranes a stable,...
- $59.51
- $59.51
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Autoshield GB Autoglass PrimerVendor:
For pre-treating auto glass and vehicle body bond faces before applying Adheseal Autoshield 1-FC single-component polyurethane, Autoshield GB Autoglass Primer provides a secure bond link and critical UV blockout protection. This solvent-based black primer reacts with atmospheric moisture to form a thin, receptive layer...
- $56.25
- $56.25
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Megapoxy 154Vendor:
For treating damp surfaces, masonry, and green concrete, Megapoxy 154 is a two-component water-based epoxy designed to prime, seal, and provide a moisture barrier before laying down floor finishes or secondary membranes. It cures to a matte, chemical-resistant coating that tolerates foot traffic and...- $700.00
- $700.00
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Sika Primer-3 N Epoxy PrimerVendor:
For sealing and bonding jobs on porous surfaces or metals, Sika Primer-3 N Epoxy Primer is the single-component, solvent-based primer required to prepare the substrate before applying Sikaflex, SikaHyflex, SikaBond, or Sikasil adhesives and sealants. Adhesion promotion mechanism The primer functions as an adhesion...- From $71.45
$0.00- From $71.45
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Ardex Multiprime PrimerVendor:
For porous substrates including CFC sheet, concrete, masonry, and jointing compound over plasterboard, ARDEX Multiprime prepares the surface to improve the adhesion of subsequent approved ARDEX products. This water-based liquid primer dries quickly in both internal and external applications, providing a reliable bond interface...- $301.48
- $301.48
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Gripset GP PrimerVendor:
For porous building substrates where preparation is required before waterproofing or tiling, GP Primer consolidates the surface and stabilises porosity. It forms a high-adhesion bonding key across porous materials, ensuring that Gripset waterproof membranes and tile adhesives adhere reliably without premature water loss into...- From $87.36
- From $87.36
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Gripset OP PrimerVendor:
For waterproofing and tiling installations where adhesion to metal flashings, rigid PVC leak control flanges, ceramic tiles, or smooth concrete is required, OP Primer provides a solvent-free bonding bridge. It establishes a secure grip on difficult, non-porous surfaces to prevent Gripset membranes and tile...
- From $160.32
- From $160.32
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Gripset Xpress Primer H2O Plus PrimerVendor:
To prevent waterproofing membranes and topical coatings from blistering or delaminating over damp or green concrete, Xpress Primer H2O Plus Primer forms a single-component vapour barrier that locks down residual substrate moisture. Unlike traditional epoxy vapour barriers, this water-resistant primer stops moisture without altering...
- $389.93
- $389.93
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Gripset Xpress SP PrimerVendor:
For high-adhesion priming on non-porous, dense, and smooth substrates where standard absorbing primers cannot bond, Gripset Xpress SP Primer provides a solvent-free alternative to hazardous solvent-based systems. It is formulated to enable the direct application of Gripset self-adhesive sheet and liquid membrane systems over...
- $298.34
- $298.34
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Gripset E-60 Epoxy PrimerVendor:
For damp or green concrete, masonry, and mineral substrates where residual moisture exceeds maximum allowable limits, Gripset E-60 Epoxy Primer serves as a water-based epoxy vapour barrier, moisture barrier, and high-adhesion primer. It prevents moisture penetration, rising damp, and efflorescence prior to the application...
- From $106.24
- From $106.24
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RLA Universal PrimerVendor:RLAFor preparing floors prior to tiling or self-levelling, RLA Universal Primer provides a rapid-drying, solvent-free acrylic bond coat over both absorbent and dense surfaces. It creates a secure key for cement-based ceramic tile adhesives and levelling compounds over substrates including water-based painted surfaces, burnished...
- From $121.14
- From $121.14
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RLA Moisture Seal PrimerVendor:RLAFor subfloors and walls showing signs of rising damp, or green concrete slabs that need immediate coating, RLA Moisture Seal Primer acts as a two-part water-based epoxy barrier to block moisture vapour transmission and prevent subsequent floor finishes from blistering, bubbling, or delaminating. It...
- $459.03
- $459.03
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Mapei Primer GVendor:
When tiling over gypsum plaster, pre-cast gypsum panels, or anhydrite screeds, Primer G prevents the chemical reaction between substrate sulphates and cementitious adhesives. By isolating these incompatible materials, it stops the formation of ettringite crystals, which otherwise cause the tile adhesive or smoothing compound...- From $57.91
- From $57.91
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Mapei Eco Prim T Plus PrimerVendor:
For interior floor preparation where levelling compounds or cementitious adhesives must bond reliably to both absorbent and non-absorbent surfaces, Eco Prim T Plus Primer establishes a high-adhesion keyway. This solvent-free acrylic resin-based primer in water dispersion prepares challenging substrates—including very compact concrete, old adhesive...
- From $103.16
- From $103.16
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SILCOR® Primer BSVendor:
SILCOR® Primer BS is GCP's fast-drying, single-pack modified polyurethane primer for compatible SILCOR polyurethane waterproofing membranes. It is designed for dry, prepared construction substrates and provides the bond between the substrate and the liquid-applied membrane. Where SILCOR Primer BS fits GCP specifies Primer BS...- $299.29
- $299.29
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EPOCOTE™ F100W Epoxy Primer – Clear or GreyVendor:
EPOCOTE™ F100W is GCP's two-part, water-based epoxy primer and sealer for concrete and other compatible construction substrates. This Adheseal listing includes Clear and Grey variants, which GCP positions differently within SILCOR® waterproofing systems. Clear or Grey? EPOCOTE F100W Clear: the general-purpose clear primer/sealer used...
- From $471.81
- From $471.81
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RLA Zinc PrimerVendor:RLAWhen bare steel needs more than a basic coat of paint, RLA Zinc Primer gives it sacrificial zinc protection against rust and corrosion. This one-pack zinc-rich epoxy primer is built for exposed steelwork, repair work and touch-ups where long-term protection matters. With 85% zinc...
- $147.47
- $147.47
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Frequently Asked Questions
Does every caulking job need primer?
No. Primer is selected according to the sealant system and substrate. Some products are designed for primerless adhesion on common surfaces, while porous, difficult or high-performance applications require a specified primer. Check the sealant technical data before applying anything to the joint.
How do I choose a primer?
Match the primer to the substrate and the sealant or adhesive system. Porous and non-porous surfaces may require different products, and some primers are specific to a manufacturer or chemistry. Confirm the approved combination, preparation method, coverage and drying window in the technical data.
How should primer be applied?
Apply a thin, even film to the clean bond area using the method specified by the manufacturer. Avoid pooling or contaminating adjacent finished surfaces. Allow the primer to flash or dry for the stated time before applying sealant; applying too soon can weaken the bond.
Can I use a general-purpose primer?
Only when the sealant manufacturer approves it for the exact substrate and application. A general-purpose primer is not automatically compatible with every silicone, polyurethane, acrylic or hybrid sealant. Use the product technical data as the authority and test the complete system where the joint is critical.
What happens if primer is applied incorrectly?
Excess primer, incomplete drying, contamination or use on an unsuitable surface can reduce adhesion and create visible defects. Remove failed preparation where possible, clean the surface again and repeat the approved process. Do not assume adding more primer will correct a preparation problem.