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Stormdry Repointing Additive No.1 - Wall Repointing - Breathable Protection Against Rain Penetration
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Stormdry Repointing Additive No.1 - Wall Repointing - Breathable Protection Against Rain Penetration

TK-SP STORMDRY REPOINT NO1 500

Safeguard Europe Ltd Variant:

Waterproofing admixture for repointing, increasing water repellency on the treated substrate whilst still allowing the mortar to breath. Compatible with Stormdry Masonry Protection Cream.

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Application

Joints should be raked out squarely to a depth of twice their width. This should result in a depth of approximately 15 – 25 mm, and never more than 35 mm. The joints should then be brushed out to ensure that the repointing mortar can form a good bond.


After shaking the bottle, Stormdry Repointing Additive No.1 should be diluted with clean tap water in the ratio 1 part Stormdry Repointing Additive No.1 to 9 parts water by volume. Higher concentrations are not recommended. The resulting gauging solution should be added to the chosen mortar mix to attain workability.


To avoid shrinkage it is important to add the gauging solution carefully to ensure that only the minimum quantity necessary to attain workability is used. Once mortar has started to set and has become unworkable it should not be reworked by adding more gauging solution. For this reason, only small batches of mortar should be mixed at a time.

Before the repointing mortar is applied, raked out mortar joints should be wetted – e.g. by flicking water using a wet brush. The repointing mortar should be applied into the raked out joint using a suitable pointing iron or repointing gun and tooled firmly. Where deep mortar joints are being repointed this may need to be done in two stages to achieve good compaction.


Wherever possible it is beneficial to tool the mortar to a “bucket handle” finish as this provides the best durability and weathertightness. The curing time will depend to a large extent on the chosen repointing mix (e.g. mixes containing cement will cure more quickly than those based on pure lime). During the curing period mortar should be protected from frost and should be prevented from drying out too quickly. In dry, windy or warm weather it may be necessary to spray the surface of the wall occasionally or cover the wall with damp hessian to allow a proper set, particularly where a lime mortar has been used.

Description

A waterproofing admixture that is diluted with water and can be added as a gauging solution to sand:cement or sand:lime repointing mixtures. Product appears as a white and milky liquid. Should be applied to the raked-out joint using a suitable pointing iron or repointing gun.


Features and benefits:

  • Reduces rain penetration through masonry walls.
  • Improves workability of mortar mixes.
  • Suitable for both cement and lime based mortars.
  • The modified mortar is breathable.

General information

Color

White

Finish

Clear

Uniclass

Ss_15_30_50_55 Mortar repointing systemsPrimary

CAWS

F10/665 Pointing

Z21/180 Admixtures for site made cement gauged mortars

Specification data - Mortar repointing systems Enhanced data

Coverage

5 m² of masonry per 500 ml bottle.

Capacity

500 ml.

Literature

Stormdry Repointing Additive No.1 Datasheet

Stormdry Repointing Additive No.1 Datasheet

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