Stopgap P131 Primer


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Stopgap P131 Primer

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STOPGAP P131 is a neoprene primer designed to promote the adhesion of STOPGAP smoothing underlayments to smooth non-absorbent surfaces.


It can be used as a general purpose primer for absorbent surfaces to promote adhesion and to prevent unacceptably rapid drying of adhesives and smoothing underlayments. It is suitable for use over normal underfloor heating installations.

STOPGAP P131 is coloured green to provide the user with visual control of coverage uniformity.

STOPGAP P131 should be used on non-absorbent surfaces of STOPGAP Waterproof Surface Membranes, terrazzo, power floated concrete, quarry and ceramic tiles, sound asphalt, steel, well bonded epoxy and polyurethane coatings and minimal existing adhesive residue.It should also be used on absorbent surfaces such as concrete, sand/cement screeds, plywood, hardboard and chipboard.


Floor surfaces must be suitably prepared: sound, smooth, dry (<75%RH) and free from contaminants that may prevent adhesion. Concrete and sand/cement screeds must be fully cured and any laitance or surface treatments must be removed prior to the application of the appropriate STOPGAP underlayment. The temperature of the surface must be above 10°C when the primer is applied to the subfloor and underfloor heating must be off for at least 48 hours before,during and after application. Ensure the subfloor is dry and incorporates an effective damp proof membrane.



For absorbent surfaces add 1 part of STOPGAP P131 to 4 parts of clean cold water and stir until thoroughly dispersed. For non-absorbent surfaces, apply the primer neat. Apply STOPGAP P131 evenly to the whole surface to be treated and allow it to dry completely.


This will vary depending on the temperature, humidity and absorbency of the subfloor. On absorbent subfloors, at 20°C, allow 20 to 30 minutes before proceeding with the application of STOPGAP smoothing underlayments or STYCCOBOND adhesives. On non-absorbent subfloors, at 20°C, this is typically extended to 60 minutes. These times will be extended at lower temperatures.


Avoid excessive trafficking of the subfloor once the primer has dried.

TOOLS  Paint roller or medium stiff broom. Wash tools with warm water immediately after use.

STORAGE Store between 5°C and 30°C. Protect from frost.

SHELF LIFE 12 months in unopened containers and stored under good conditions.

STOPGAP P131 General Purpose Neoprene Primer features • General purpose for both absorbent and non-absorbent surfaces • Suitable for use with marine applications • Prevents rapid drying of adhesives and smoothing underlayments • Pigmented to provide coverage control packages 5 litre bottle

If you wish to order a large quantity please contact us direct for shipping cost.

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Meta Title Stopgap P131 primer
Meta Keywords Stopgap P131 primer, General purpose neoprene primer