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When preparing dry, porous substrates for waterproofing or tiling, the adhesion of subsequent layers is critical. Gripset GP Primer ensures this bond, creating a stable, dust-free surface ready for Gripset membranes and adhesives. It provides peace of mind that the system's foundation is sound, right from the start.
Gripset GP Primer is specifically formulated to prepare dry, porous surfaces, ensuring optimal adhesion for Gripset waterproof membranes and tile adhesives. It addresses the common site challenge of inconsistent porosity and dusting on substrates like concrete, screed, masonry, and compressed fibre cement sheeting. By sealing the surface and promoting a strong bond, it eliminates the risk of membrane or adhesive failure due to poor substrate preparation.
The performance of any waterproofing or tiling system begins with a reliable primer. Gripset GP Primer provides the critical foundation through these key properties:
Gripset GP Primer is straightforward to apply. It is used neat, without dilution, and can be spread quickly by brush or a medium nap roller. For highly porous or dusty surfaces such as aerated concrete or aged screeds, a second coat may be necessary to achieve a stable base. The primer must be fully dry before applying any subsequent finishes. Tools clean up easily with water while wet.
As a foundational component, Gripset GP Primer is typically the first step in many Gripset waterproofing and tiling systems. On balconies and podium decks, it prepares the substrate before an additional non-porous primer like Gripset OP Primer may be applied to specific details. In internal wet areas, it creates the initial bond for subsequent products like Gripset Xpress SP Primer, followed by the main waterproofing membrane such as Gripset 38FC and tile adhesives. Its role is to ensure the entire system has a stable, high-adhesion base.
Gripset offers a range of primers, each formulated for specific substrate conditions. Gripset GP Primer is your choice for dry, porous substrates such as concrete, screed, and masonry, where it enhances adhesion for subsequent Gripset membranes and adhesives. In contrast, for substrates presenting dampness, high residual moisture, or active rising damp, the correct choices are Gripset E60 or Gripset Xpress H20 Primer Plus, both engineered to manage moisture. Furthermore, when dealing with non-porous surfaces that require enhanced adhesion, such as PVC penetrations or metal, Gripset OP Primer is typically specified.
Use this primer to enhance adhesion for Gripset waterproof membranes and tile adhesives on porous substrates. It ensures a reliable bond on concrete, screed, masonry, and plasterboard.
No, do not apply Gripset GP Primer over damp surfaces, those with high residual moisture, or areas subject to rising damp. For these conditions, use Gripset E60 or Xpress H20 Primer Plus.
The primer is fast drying, ready for finishes in 30 minutes at 23°C and 50% RH. Apply finishes shortly after drying to reduce contamination risks.
Expect a coverage rate of 1 litre per 8-10 square metres per coat. Highly porous surfaces like aerated concrete or aged screeds may require two coats for stability.
| Application | Key benefit | Primary trades |
|---|---|---|
| Priming porous substrates before Gripset waterproofing | Ensures strong, reliable adhesion for waterproofing membranes, preventing delamination. | Waterproofers, builders |
| Preparing surfaces for tile adhesive application | Improves bonding of tile adhesives on concrete, screeds, and cement sheeting, reducing tile failure risks. | Tilers, renovators |
| Binding dusty or highly porous surfaces like aerated concrete | Stabilises challenging substrates, consolidating loose particles to create a sound base for subsequent coatings. | Waterproofers, renderers, tilers |
| Internal and external priming jobs | Versatile for both indoor and outdoor porous substrate preparation, simplifying product selection. | All trades working with Gripset systems |
Ensure substrate is clean, dry, and free from dust, laitance, and contaminants.
Apply by brush, roller, or spray at a coverage rate of 8–10 m²/L.
This material is classified as a NON-Hazardous Chemical and NON-Dangerous Goods according to Safe Work Australia criteria.
Wear safety shoes, overalls, gloves (nitrile rubber suitable for intermittent contact), and safety glasses to prevent skin and eye contact. Wash hands thoroughly after use and before eating, drinking, or smoking.
Natural ventilation is adequate under normal use conditions.
Store in a cool, dry, well-ventilated place out of direct sunlight and away from freezing conditions. Keep containers closed when not in use. Shelf life is 12 months in original unopened packaging. Dispose of material and containers according to local regulations; wet product can be cleaned with water.
Proper substrate preparation is critical for the long-term adhesion of membranes and adhesives. This guide details requirements for common porous surfaces.
Surface prep: Surfaces must be clean, sound, smooth, and dry. Remove all loose material, dirt, dust, oil, grease, laitance, and curing compounds. New concrete needs at least 28 days to cure, while renders/screeds need 7 days. Mechanically remove unsound layers by grinding or abrasive blasting.
Primer: Required. Apply 1-2 coats neat, until full coverage is achieved. If damp, use Gripset E60 or Xpress H20 Primer Plus instead.
Surface prep: Ensure surfaces are clean, sound, and dry. Point masonry joints flush. Fill and level all surface defects like voids, holes, or non-structural cracks. Mechanically remove unsound layers.
Primer: Required. Apply 1-2 coats neat. Do not apply if surfaces are damp or subject to rising damp.
Surface prep: Clean and dry. These highly porous surfaces or those prone to dusting require thorough cleaning. Remove all dust and loose particles.
Primer: Required. Apply 2 coats, or until the surface is stable and consistent. This ensures adequate binding of surface dust and improved adhesion for subsequent layers.
Surface prep: Surfaces must be clean, sound, smooth, and dry, free from all contaminants. Ensure boards are installed to manufacturer specifications and relevant building standards.
Primer: Required. Apply 1 coat neat for enhanced adhesion.
| Property | Value |
|---|---|
| Form | Thin Liquid |
| Colour Wet | Milky White |
| Colour Dry | Clear |
| Solubility in Water | Miscible |
| Specific Gravity (20 °C) | 1.01 |
| pH | 8 |
| Coverage Rate | 1 litre per 8-10m² per coat |
| Dry Time (23°C, 50% RH) | 30 minutes |
| Application Temperature Range | 5°C to 35°C |
| Shelf Life | 12 months |
Here are some common examples on where Gripset GP used by our customers.
