GRUMO® XXS base mortar concentrate, 20 kg

Item number: A0007

GRUMO® XXS, the concrete concentrate for the really large objects. Clever, economical and good quality.


52,50 €
2,62 € per 1 kg

including 19% VAT , plus shipping

Available now!

Shipping time: 2 - 3 workdays


GRUMO® XXS is not a ready-made mortar, but a concentrate that can be used to transform cheaper DIY shop concrete into proven and trusted GRUMO® base mortar for sculptural design. In this way you can save a lot of money without losing the coveted properties of GRUMO®.

The recipe: To prepare 100 kg of base mortar, mix a 20 kg bag GRUMO® XXS with two 40 kg bags of screed/concrete, which is available at a really low cost from your local DIY shop. That's a brilliant way to get along on a small budget, particularly for larger projects, such as for playgrounds, schools or parks.

Of course, the granulation in the screed/concrete from the DIY shop is rather coarse, and as a result, so is the base mortar thus produced. But that?s not a problem with large workpieces and, if required, the fine-grained GRUMO® can be used for the final layer.

GRUMO® XXS is white and when mixed with grey screed/concrete it takes on a concrete-grey colour. The material can be shaped for up to 2 hours and hardens after one day. This time can be shortened as required by adding some of our concrete accelerator.

You can see a selection of objects that customers have made with GRUMO® XXS, HERE, and a video tutorial on using GRUMO® XXS can be found HERE. Let yourself be inspired!

Buy BACKSTEIN®, the proven and trusted artists' mortar brand, at a fair price in our online Moertelshop and take advantage of our unbeatable cheap shipping.

Technique: build-up technique laminating
Velocity: slow set
Granulation: grain up to 4 mm grain up to 8 mm
Refractory: non refractory
Frostproof: frostproof
Object Size: 10 - 500 kg
Shipping weight: 20,00 kg
Product weight: 20,00 kg
Contents: 20,00 kg

Average product rating

Write your first review and help others with their purchase decision:

Other customers have also bought the following items
GRUMO® base mortar, white

GRUMO® base mortar, white

Starting from 13,60 € *
MOMO ® modelling mortar, white

MOMO ® modelling mortar, white

Starting from 14,80 € *
FIFI ® grout and coating mortar, white, 5 kg

FIFI ® grout and coating mortar, white, 5 kg

13,60 € *
2,72 € per 1 kg