X-21 Flat Base 10ml

Tamiya X-21 Flat Base is not a paint — it is a flattening additive in a 10 ml bottle that is mixed into gloss paints and varnishes to reduce their shine. It is not applied on its own.

Manufacturer Tamiya
Product EAN8591111825214

Responsibility details are not available.

2.20 €
1.82 € without VAT
In stock
Free shipping on orders over 1,000 czk in czech republic Personal pickup in Prostějov 14-day returns

About product

Tamiya X-21 Flat Base 10 ml — Flattening Additive

Note: X-21 Flat Base is not a paint or a matte varnish. It is a flattening additive from Tamiya's Acrylic MINI range in a bottle with a volume of 10 ml. It is added into a gloss paint or varnish and reduces its shine — turning a glossy surface into a semi-gloss or matte one. On its own it has no covering color function and is not sprayed or brushed on by itself.

What it IS and what it IS NOT

  • It IS: an additive for gloss acrylic paints and varnishes that controls the level of shine.
  • It is NOT: a paint (it has no shade of its own to apply), nor a ready-made matte varnish for a final coat over the model.

Use

  • Mixed into a gloss paint (X range) so the resulting coat turns matte — useful when you need a shade that does not exist in a matte version.
  • Mixed into a gloss varnish to achieve a semi-gloss or matte finish.
  • Controlling the gloss level: the higher the share of additive, the more matte the surface. A small share gives a satin/semi-gloss look, a larger share a matte one.
  • Unifying the model's gloss after decals or washes have left areas with different shine.

Usage tips

Always mix the additive well — it settles. Add it to the paint gradually and in small amounts, and test the result on a sprue offcut, not directly on the model. Too much additive causes a whitish (milky) haze and a washed-out, chalky-looking paint — less is more here. The mix can be thinned for an airbrush with Tamiya's X-20A thinner. Apply it in thin coats; a heavy coat increases the risk of haze.

Who the additive is for

For modelers who want to control the gloss level themselves and do not want to buy both a matte and a gloss version of every shade. Builders of military vehicles, aircraft and figures, where a matte or satin finish is the norm, will appreciate it. The 10 ml volume lasts a long time, since it is used in small doses.

Intended for modeling use, not a toy. Work in a well-ventilated area, use respiratory protection when spraying with an airbrush. Keep out of the reach of children.

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FAQ

No, neither. Despite the name Flat Base, it is not a paint or a primer, but a flattening additive that is mixed into a gloss paint or varnish to reduce its shine.

No. It is not applied on its own — it has no function as a covering paint or matte varnish. Always mix it into the paint or varnish whose shine you want to reduce.

Add it gradually and in small doses, depending on how matte a finish you want — a smaller share gives a satin look, a larger one a matte finish. Always test the result on an offcut, not directly on the model.

Typically from too much additive in the paint, or too heavy a coat. Reduce the share of additive, mix the blend thoroughly, and spray in thinner coats.

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